Hi,

I have an optimization problem with equality constraints and I use `NLopt`

`LN_AUGLAG`

solver with derivative-free local solver like `LN_NELDERMEAD`

or `LN_SBPLX`

. However I don’t have a clear understanding how to choose tolerance for both local and `LN_AUGLAG`

solvers. Is there any intuition how they should correlate?

Ex, I want to find `min_x`

of an objective function `f(x)`

with constraints`g(x)=0.`

And I know that there is a single solution to this problem.

1 Like